This is the moment police officers storm a bar near London Bridge and order people to "get down".

Officers rushed into the Katzenjammers German beer bar, near Borough Market, appearing to shout for people to take cover and "stay down" on Saturday night.

In the footage, posted to Twitter, revellers desperately hide behind tables and chairs as officers continue to warn them to stay put.

Sounds of glasses being smashed can be heard as people shaken from the incident become disorientated.

Police are understood to have swept through bars and pubs, ordering people to stay put following the terror attack late on Saturday.

Seven people have been killed after three armed men ploughed a van into pedestrians at 50mph on London Bridge late on Saturday night.

They then leapt from the vehicle and began stabbing people in nearby restaurants and bars at random.

While London residents were listening to the news, still wondering if the terrorists had been caught or if they were on the run in the city, Metropolitan Police tweeted out a chilling warning to its followers.

The image showed three large words: “Run, Hide, Tell”.

Police ordered people: “You must: RUN - to a place of safety. This is a better option than to surrender or negotiate. If there’s nowhere to go, then...”

“HIDE - Turn your phone to silent and turn off vibrate. Barricade yourself in if you can.

“TELL - the police by calling 999 when it is safe to do so.”

The order to turn phones to silent and turn off vibrate - so that nearby attackers could not hear you if you’re hiding and relatives are trying to get in touch - particularly seemed to alert people that this was indeed a major incident and more lives were at risk.

The Metropolitan Police’s message was shared more than 60,000 times as Londoners tried to warn their neighbours how to be safe.

Horrified witness described three attackers, wearing hoax suicide vests to warn police away from them, brandishing knives at diners in restaurants in the Borough Market area, close to London Bridge.

It comes less than two weeks after a terror attack in Manchester which killed 22 innocent victims, including children, prompting the government to raise the terror alert threat level from ‘severe’ to ‘critical’.

The level was later revised down.

Armed police were on the scene last night within minutes and shot dead three attackers who were wearing fake suicide vests.